Adjacent-network heap exposure via IP length confusion
Published Aug 27, 2026 · Updated Aug 27, 2026
Out-of-bounds read in the wicked DHCPv4 client 0.6.80 and earlier allows remote attackers to parse adjacent heap data via crafted DHCP packets. ni_capture_inspect_udp_header() passes the IP total length as the UDP payload length, causing the option walker to read beyond the 1500-byte receive buffer. The attacker must share the network; the over-read is limited to 68 bytes, with no demonstrated memory write, control of adjacent bytes, or remote exfiltration.
Summary
What happened
Out-of-bounds read in the wicked DHCPv4 client 0.6.80 and earlier allows remote attackers to parse adjacent heap data via crafted DHCP packets. ni_capture_inspect_udp_header() passes the IP total length as the UDP payload length, causing the option walker to read beyond the 1500-byte receive buffer. The attacker must share the network; the over-read is limited to 68 bytes, with no demonstrated memory write, control of adjacent bytes, or remote exfiltration.
The record
- CVE
- CVE-2026-71402
- Published
- Aug 27, 2026
- Updated
- Aug 27, 2026
- Vendor
- NeuVector
- Product
- wicked
- Classifications
- CWE-130, CWE-125, T1557.003
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 27, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=0.6.80
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo